07. Area of Figures

package ConditionalStatements;

import java.util.Scanner;

public class AreaOfFigures_07 {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        String figure = scanner.nextLine();

        //проверяваме каква е фигурата
        //square, rectangle, circle или triangle
        // %s - String, %d - int, %f - double, %c - char, %n or \n - new line

        double area = 0;

        if(figure.equals("square")){
            double side = Double.parseDouble(scanner.nextLine());
             area = side * side;
        } else if (figure.equals("rectangle")) {
            double sideA = Double.parseDouble(scanner.nextLine());
            double sideB = Double.parseDouble(scanner.nextLine());
             area = sideA * sideB;
        } else if (figure.equals("circle")) {
            double radius = Double.parseDouble(scanner.nextLine());
             area = radius * radius * Math.PI;
        } else if (figure.equals("triangle")) {
            double side = Double.parseDouble(scanner.nextLine());
            double height = Double.parseDouble(scanner.nextLine());
            area = (side * height) / 2;
        }

        System.out.printf("%.3f", area);
    }
}